java - JTextField 周围的 TitledBorder

Question

在 java 中，当我在 JTextField 周围使用 TitledBorder 时，JTextField 的一部分会在各个方向上溢出 TitledBorder。有没有办法防止这种情况？

Answer 1

如果用 a 替换文本字段的TitledBorder边框，则会丢失该字段的自然边框。解决方案是创建一个与字段边界CompoundBorder相结合的：TitledBorder

JTextField field = new JTextField(10);
field.setBorder(new CompoundBorder(BorderFactory.createTitledBorder("Title"), field.getBorder()));

但是 TitledBorder 仍然继承文本字段的背景颜色。

另一种解决方案是将文本字段嵌入 aJPanel并将其TitledBorder放在面板上：

JTextField field = new JTextField(10);

JPanel borderPanel = new JPanel();
borderPanel.setBorder(BorderFactory.createTitledBorder("Title"));
borderPanel.add(field);

Answer 2

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class AA
{
    public static void main(String[] args)
    {
        FrameCreator Frame= new FrameCreator();
        Frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Frame.setVisible(true);
    }
}

class FrameCreator extends JFrame
{
    public FrameCreator()
    {
        int height=100;
        int width=300;
        setSize(width,height);
        setLocation(0,0);

        setTitle("TextField example");

        showPanel=new JPanel();
        textFieldPanel=new JPanel();

        label=new JLabel("Sentence");
        label.setFont(new Font("Serif",Font.PLAIN,12));

        showPanel.add(label);
        add(showPanel, BorderLayout.CENTER);


        textfield=new JTextField("Sentence", 20);
        textfield.setBorder(BorderFactory.createTitledBorder("Name"));
        textfield.addActionListener(
            new ActionListener()
            {
                public void actionPerformed(ActionEvent evento1)
                {

                    String sentence=textfield.getText();


                    label.setText(sentence);
                }
            });


        textFieldPanel.add(textfield);
        add(textFieldPanel, BorderLayout.SOUTH);
    }

    JLabel label;
    JPanel showPanel, textFieldPanel;
    String sentence;
    JTextField textfield;
}

我用过 textfield.setBorder(BorderFactory.createTitledBorder("Name"));